Electric regulation



ELECTRIC REGULATION;

APPLICATION FILED NOV. IV 1916. RENEWED APR. 11,, 12922.

1,420,818 Patented June 27, 1922 '1 1/ 32 z giiiiiiia g;

29 9 2" V Ill; 9 7 I ,7 :I D

INVENTOR;

UNlT Eu STATES PATENT ,orr ca.

JOHN L. cnnmme, or warm Prams, new roux, assrenon 'ro scum) oourmsa conrm, A coaronarron or mew YORK.

ELECTRIC REGULATION.

Specification of Letters Patent. P te t d J mm 27, 1922,

Application filed Iovember 1, 1916, Serial N0. 128,820. Renewed April 17, 1922.- serial No. 558,921.

Regulation, of which the following is 'a.

description. 7

My invention pertains to that class of electric regulation wherein it is desired to regulate an electric function in a predetermined manner, and has for a particular object to provide means whereby said regulation wi be automatically accomplished.

This application is a continuation, in so far as common subject-matter is disclosed, of my application for patent for improvements in electric regulation, Serial No. 74,070, filed January 25, 1916.

In the drawing, Fig. I is a diagrammatic representation of 'one type of electrical system embodying my invention; and

II illustrates a modification which may be made in the general system portrayed in Fig. I without departing from my invention. 7

v In Fig. I, 1 represents a dynamo or gen orator, the positive terminal of which "is connected as by lead 2 with the positive terminals of the storage battery 3 and lamps or other translating devices indicated at 4. The negative terminals of the trans.-

- lating devices and the storage battery are; connected as by lead 5 with one side of any suitable switch 6, the opposite terminal of which is connected as by wire "7 with one end of the or solenoid 8, the opposite end of which connected asby lead 9 with the negative terminal of the generator. The generator is provided with any suitable exciting means, in this instance indicated as the usual shunt coil 10, having in series therewith a regulating element 11 indicated as a carbon pile. It will therefore be obvious that the generator may be regulated by' proper manipulation of the pressure applied to the pile 11,. which will control the resistance thereof. A pivot '12 carries a bell-crank lever comprising the short arm 13 and the long arm 14,- wbile the pivot 15 carries a' bell-crank lever having the short arm 16, and the long arm 17. The carbon pile 11 is held by any of the well known supportin means, purposely omitted for the sake o clearnem, between'the levers 13 and.

13 and 16 and tending to draw the same to- 16; and therefore the pressure upon the pile 11 may be increased by swingingthe levers 14 and 17 in a downward directlon so as to cause levers 13 and 16 to approach each other. The sprlngs 18 and 19 tend to draw the levers 14 and 17 downwardly and increase the pressure upon the pile 11, while the limit of downward movement that may be given the said levers may be adjusted as by screws 20. and 21. If desired, the springs 18-and 19 may be suppremed and weights, as indicated at'22, used in their stead, or such weights may be used in conjunction therewith. 23

1s a spring yieldin ly'connecting the levers ether. The tension of the spring 23 may e adjusted asby nuts 24. The outer extremities oflevers 14 and 17 are provided-with. pivotal connections 25 and 26, carrying the cores 27 and 280i iron or other magnetic material. The weightof said cores tends to .draw their respective levers downwardly and to compress pile .11, while any upward movement given to the said cores tends to raise the respective levers and lower the pressure upon the pile' 11 so as to increase the resistance thereof. The cores 27 and 28 may be held in their positions in proper alignment by any suitable means, and are preferably provided with dashpots 29 which restrain too sudden movement of the said cores. The core 28 ;is surrounded by the' coil 8 in such manner that energization of the said coiltends tolift the core. The core 27 is surrounded by the coil 30 which is 90 shown in shunt across the generator and which when energized tends to lift the core 27. The operationof the coil- S-may be ad.

' justed as by means of the-variable shunt 31,

.coil afiecting the core 28 will be responsive to current in the battery circuit only, while the coil 8 of Fig. I is responsive to the total generator output. r he main switch 6, the mere presence of which is diagrammatically indicated, is preferably one of the automatic variety, closing its circuit when the generator voltage is sub- 11 0 stantially equal to that of the storage battery, and openin "the circuit when the gensupplied by the battery.3 in a well known manner. If the nerator have its speed brought up until 1ts voltage is slightly in exce$ of that of the battery, switch 6 will close and current will then flow from the generator to the battery and translating devices, returning to the generator through coil 8, 'andtherebycausing the same to tend to raise the core 28. AndI so adjust the tension of spring 19, spring 23and ad'ustable shunt 31, or whatever instrumenta ities may be employed for the purpose of adjustment, that when the current supplied by the generator, which of course will tend to increase with an increase in speed, reaches a predetermined maximum, as for example the maximum current desired to have delivered by the generator, this'o'utput will, by raising the core 28 antfswinging the lever 17 in an upward direction, swing the lever 16 in a direction away from the pile 11 cso as to decrease the pressure thereupon and cut down the generator field and prevent this maximum desired current from being exceeded. Throughout this operation, lever 14 will rest upon its stop-20, and lever 13 will .55 20 and swing the lever 13 a directionform an abutment for the opposite end of the pile 11. If, for any reason, delivery of this maximum current controlled by the coil 8' necessitates the maximum desired voltage upon any part of the s stem, across which may be connected the co1l'30, which in this instance is shown across the generatorcir- V zcuit'and therefore ractically determining its terminal voltage, I so adjust resistance 32, spring 18 and weight 22, or whichever of i such devices maybe used th at when the generator tends to causethis maximum desired voltage to be exceeded, coil '80 will raise core 27 and lift lever 14 from its stop away from the pile 11 so as to increme the resistance thereof and prevent; this desired maximum voltage irom being exceeded.

As soon as the voltage coilbegins to lower the generator voltage the current in the coil 8 will begin to fall off and lever 17 will tend to settle down upon its stop 21 and core 28 will tend to assume the position shown in the formed by the voltage responsive means so long as the current remains below that limited by the solenold 8.and its cooperating parts. If the rise in voltage across the sysv tem be due to the rise in voltage across the battery terminals, owing to the battery having been fully char ed, it is desirable when this point is reache that the battery charg ing current be quite substantially reduced or terminated, more or less abruptly, so as :to save a long tapering charging current which would ordinarily take place if the maximum desired voltage were held across the battery terminals, as is well understood in'the art. And it will be noted-that when x the current regulating means is operative and lever 16 1s swung away from the pile, the tension of spring 23 upon' lever 13 is somewhatincreased by the motion of lever.

. 16. Therefore, when the voltage responsive means usurps the function of the current re {sponsive means, it first moves the lever 13 and its cooperating parts against a slightly increased pull of the spring 23, which is relieved as soon as core 28 and lever 17 descend. And, therefore, the voltage responsive means operates against a slightly lower opposition then when it started to usurp the function of regulation, andnow holds a slightly lower voltage upon the system than that necessary to bring it into action. And this slight difference involtage will cause the charging current to fall off quite rapidly and approach zero, as may readily be determined b I which Wlll be plain to one skilled in the art.

The operation of that modification. intended to be brought" out by use of Fig. II is substantially the same as the operation above with respect to Fig. I,.with the exception that it is the current in ,the battery charging circuit that is limited through the instrumentality of the current responsive means, including coil 33 instead of coil 8 of Fig. I, and, therefore, the battery charging c'rrent will be limited, instead of the total generator output; and in such an. ar-

rangement it is obvious that the battery charging current may be made to fall off evenmore rapidly when the voltage responsivemeans usurps the function of regulation than in the system of Fig. I when the translating devices are in circuit.

From the foregoing it will be noted that my invention produces a system wherein the current delivered by the generator to a particular circuit, as for example the main circuit or the battery circuit, may be held from exceeding a predetermined desirable limit, and wherein the-voltage across a circuit, as for example across the generator terminals or the battery terminals, ma be as .grawing and lever 16 will serve merely as. 'held from exceeding a predetermined limit,

adjusting the parts in a manner and that whenever the voltage means usurps the function t .of another afiecting means.

react upon the system in such manner that the charging current will, ,in an adjustable degree, he abruptly decreased or terminated. do not wish in any way to limit myself to any of the exact, constructions-or. details of operation embodiment 0%- my invention, for it will be obvious that wide departure may'be made without departing from the spirit 'and'scope thereof whlch is set'forth in the following claims. a i

' What I claim is:

1. The combination with regulating means,

a plurality of means for aifecting the same,

means for adjusting said aflecting means and means whereby the operation of one o said affecting means affects the adjustment 2. The combination with regulating means, a plurality of means'for afiecting the same, voltage res onsive means mechanicallyconnected with -,and current responsive means mechanically connected with another of said affecting means, of uniting means whereby the operation of'either responsive-means affects the other responsive means. I

' 3. The combination with regulating means,

a lurality of means for afi'ecting the same, vo tage responsive means mechanically connected with one of said affecting means, and current responsive means mechanically connected with another ofsaid afl'ecting means, .of uniting means whereby the operation of either responsive means afiects the adjustment of the other responsive means.

4. The combination with regulating'means, a lurality of means for affecting the same, v0 tage responsive means mechanically connected with one of said affecting" means, and current responsive means mechanically connected with another of said afiecting means, ofuniting means whereby the operation of I either responsive means afiects the standard of operation of the other responsive means. 5. The combination w th .a generator,

means for regulating the same," means for "afl'ecting said regulating means in'responseto current fluctuations, and meansfor aflecting said regulating'means in response: to voltage fluctuations, of meansiwhereby the operation of either responsive means immediately affects the regulating action of the other responsive means.

l"- 6. The combination with 'sgnemior,

' means for regulatingt hesame, means for affecting said regulating means in response tojourrent fluctuations, and means for af-' fecting said regulating -means in response iven above to illustrate oneone' of said aflecting means' responsive to voltage fluctuations, of means whereb the operation of either responsive means a to .current fluctuations, and means for affecting said regulating means in response to voltage fluctuations, of means whereby the operation of either responsive means afiects Lthe regulating action of the other rmponsive means comprehending a permanent mechanical connection between said responsive means.

' the operation of either responsive means a {fects the regulating action of the other responsive means comprehendin a resilient connection between the responsive means.

9. The combination with a generator, a storage battery and translating devices receiving current therefrom, 'means' for affecting the operation'of the nerator, current responsive means for a ecting said regulatingrmeans, voltage responsive means for. afl'ecting said regulatingmeans, and means whereby the operation of one responsive means mechanically affects the standard of operation of the other re sponsive means.

10. The combination with a generator and a storage battery charged thereby, of means capable of regulating the generator when properly manipulated, a plurality of separately movable manipulating meanscooperating therewith to regulate the generator, current, responsive and voltage. responsive means for separately affecting the manipulating means, and means whereby the voltage responsive means is affected by the action of the current responsive means to decrease e charging current. r 11. In car lighting apparatus, combination, an electric generator, a storage-battery connected to be charged thereby, a variable resistance medium comprising a plurality of contacting members adapted to vary their aggregate resistance with variations in pressure thereon, saidresistance medium being connected in the'field circuit of said genera tor, a current coil serially connected between said generator. and said battery, a voltage separate movable cores respectively coacting with said coils, and means'mechan cally con:- nected with said cores and tending normally coil connected acrossfthe charging circuit,

- to compress medium and adapted uponregulating either of said 'cores beingi attracted to tend to cause the other'to increase the pressure upon said medium. y

12. The combination with regulating means, a plurality of movable means for separately afi'ecting the same and movable means for moving the aflecting means, of means uniting the affecting means and causing-cooperation therebetween.

13. The combination with regulating means, a plurality of movable means for separately affecting the same and movable means for moving the afi'ecting means, of means uniting the affecting means and caus- Jing cooperation therebetween' whenever one of said affecting means ismoved. '14. The combination with 'means and a lurality of separately movable means for a ecting the same, of means for separately moving the said plurality of means, and resilient means causing cooperationbetween the afiecting means whenever moved. I

1 '15. The combination with regulating" means and a plurality of means for affecting the same, separate operating means for each of said affecting means, and-resilient unitin means causing cooperation between the at fecting means.

F, 16. The; combination with regulating means and a plufality of means each capable of afi'ecting the same when moved, actuating.

means for separately moving the affecting means, ol:' means whereby motion of one affectin means causes cooperation between the a ecting means.

' 17. The 1 combination [with regulating regulating 18. The combination with a regulating element of the compressible pile type, of a plurality of movable means tending to move the, pile in opposite directions and thereby subject the same to pressure, separate moving elements-adapted to selectively and individually move j the movable means, and means for causing cooperation between said movable means.

element of the compressible pile type, of a "plurality of movable means tending to move the pile in opposite directionscand thereby. subject the same to pressure, separate moving elements adapted to selectively and individually move the; movable means, and meansfor causing cooperation between said movable means to afi'ect 'the operation of the moving elements.

- 20. The combination with a regulating element of the compressible pile type, a plurality of movable members cooperating to control the compression upon the same and separately movable members causing movement of the first-named-movable members of uniting-means whereby motion of one of the first-named movable members affects the operation of another of said first-named movable members. I

. JOHN L. CREVELING.,

19. The combinatiom with a regulating 

